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Finding the Fourth Proportional to 8,671.72, 11,968.08 and 5,690.08

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Solution

The fourth proportional to 8,671.72, 11,968.08 and 5,690.08 is: 7,853.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,671.72 : 11,968.08 = 5,690.08 : x
  2. Step 2: Convert to fraction form
    8,671.72/11,968.08 = 5,690.08/x
  3. Step 3: Cross multiply
    8,671.72x = 11,968.08 × 5,690.08
  4. Step 4: Simplify right side
    8,671.72x = 68,099,332.65
  5. Step 5: Solve for x
    x = 68,099,332.65/8,671.72
  6. Step 6: Final answer
    x = 7,853.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.